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authorMark Rutland <mark.rutland@arm.com>2023-06-05 09:01:04 +0200
committerPeter Zijlstra <peterz@infradead.org>2023-06-05 09:57:15 +0200
commit8ad17f2183fd7e37ceafddbdff334a3e2608cc84 (patch)
tree1098cbaddb74f60e39c072bdab7851aa615e8f42 /arch/hexagon
parentlocking/atomic: arm: add preprocessor symbols (diff)
downloadlinux-8ad17f2183fd7e37ceafddbdff334a3e2608cc84.tar.xz
linux-8ad17f2183fd7e37ceafddbdff334a3e2608cc84.zip
locking/atomic: hexagon: add preprocessor symbols
Some atomics can be implemented in several different ways, e.g. FULL/ACQUIRE/RELEASE ordered atomics can be implemented in terms of RELAXED atomics, and ACQUIRE/RELEASE/RELAXED can be implemented in terms of FULL ordered atomics. Other atomics are optional, and don't exist in some configurations (e.g. not all architectures implement the 128-bit cmpxchg ops). Subsequent patches will require that architectures define a preprocessor symbol for any atomic (or ordering variant) which is optional. This will make the fallback ifdeffery more robust, and simplify future changes. Add the required definitions to arch/hexagon. Signed-off-by: Mark Rutland <mark.rutland@arm.com> Signed-off-by: Peter Zijlstra (Intel) <peterz@infradead.org> Reviewed-by: Kees Cook <keescook@chromium.org> Link: https://lore.kernel.org/r/20230605070124.3741859-8-mark.rutland@arm.com
Diffstat (limited to 'arch/hexagon')
-rw-r--r--arch/hexagon/include/asm/atomic.h9
1 files changed, 9 insertions, 0 deletions
diff --git a/arch/hexagon/include/asm/atomic.h b/arch/hexagon/include/asm/atomic.h
index ad6c111e9c10..5c8440016c76 100644
--- a/arch/hexagon/include/asm/atomic.h
+++ b/arch/hexagon/include/asm/atomic.h
@@ -91,6 +91,11 @@ static inline int arch_atomic_fetch_##op(int i, atomic_t *v) \
ATOMIC_OPS(add)
ATOMIC_OPS(sub)
+#define arch_atomic_add_return arch_atomic_add_return
+#define arch_atomic_sub_return arch_atomic_sub_return
+#define arch_atomic_fetch_add arch_atomic_fetch_add
+#define arch_atomic_fetch_sub arch_atomic_fetch_sub
+
#undef ATOMIC_OPS
#define ATOMIC_OPS(op) ATOMIC_OP(op) ATOMIC_FETCH_OP(op)
@@ -98,6 +103,10 @@ ATOMIC_OPS(and)
ATOMIC_OPS(or)
ATOMIC_OPS(xor)
+#define arch_atomic_fetch_and arch_atomic_fetch_and
+#define arch_atomic_fetch_or arch_atomic_fetch_or
+#define arch_atomic_fetch_xor arch_atomic_fetch_xor
+
#undef ATOMIC_OPS
#undef ATOMIC_FETCH_OP
#undef ATOMIC_OP_RETURN